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yacy_search_server
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*) refactoring (several instances of Indetificator can be created and used parallel now)

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*) fixed a potential NPE


git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@4841 6c8d7289-2bf4-0310-a012-ef5d649a1542
pull/1/head
low012 17 years ago
parent b6cf4abc5e
commit f06c046f6c
2 changed files with 100 additions and 40 deletions
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44
source/de/anomic/language/identification/Identificator.java
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@ -4,7 +4,7 @@
// first published on http://www.yacy.net
// Braunschweig, Germany, 2008
//
// $LastChangedDate: 2008-05-18 23:00:00 +0200 (Di, 18 Mai 2008) $
// $LastChangedDate: 2008-05-23 23:00:00 +0200 (Fr, 23 Mai 2008) $
// $LastChangedRevision: 4824 $
// $LastChangedBy: low012 $
//
@ -43,37 +43,19 @@
package de.anomic.language.identification;
import java.io.File;
import java.io.FilenameFilter;
import java.util.Iterator;
import java.util.List;
import java.util.Vector;
/**
* This class can try to identify the language a text is written in.
* It has been implemented as a Singleton since it has to access several
* files on instanciation which should be avoided since it is very slow.
*/
public final class Identificator {
private List<LanguageStatistics> languages = new Vector<LanguageStatistics>();
private String languageDir = "langstats"; // directory that contains language files
private LanguageStatisticsHolder languages;
private static Identificator instance;
private Identificator() {
addAllLanguagesInDirectory(languageDir);
}
/**
* method to get an instance of this class, should be used insted of <b>new Identificator()</b>
* @return an instance of the class Identificator
*/
public synchronized static Identificator getInstance() {
if (instance == null) {
instance = new Identificator();
}
return instance;
public Identificator() {
languages = LanguageStatisticsHolder.getInstance();
}
/**
@ -197,22 +179,4 @@ public final class Identificator {
}
/**
* Reads all language files from a directory.
* @param directory the directory that contains the language files
*/
private void addAllLanguagesInDirectory(String directory) {
File folder = new File(directory);
FilenameFilter filter = new LanguageFilenameFilter();
File[] allLanguageFiles = folder.listFiles(filter);
for (int i = 0; i < allLanguageFiles.length; i++) {
if(allLanguageFiles[i].isFile()) {
languages.add(new LanguageStatistics(allLanguageFiles[i]));
}
}
}
}

96
source/de/anomic/language/identification/LanguageStatisticsHolder.java
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@ -0,0 +1,96 @@
// LanguageStatisticsHolder.java
// -----------------------
// (C) by Marc Nause; marc.nause@audioattack.de
// first published on http://www.yacy.net
// Braunschweig, Germany, 2008
//
// $LastChangedDate: 2008-05-23 23:00:00 +0200 (Fr, 23 Mai 2008) $
// $LastChangedRevision: 4824 $
// $LastChangedBy: low012 $
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
// Using this software in any meaning (reading, learning, copying, compiling,
// running) means that you agree that the Author(s) is (are) not responsible
// for cost, loss of data or any harm that may be caused directly or indirectly
// by usage of this softare or this documentation. The usage of this software
// is on your own risk. The installation and usage (starting/running) of this
// software may allow other people or application to access your computer and
// any attached devices and is highly dependent on the configuration of the
// software which must be done by the user of the software; the author(s) is
// (are) also not responsible for proper configuration and usage of the
// software, even if provoked by documentation provided together with
// the software.
//
// Any changes to this file according to the GPL as documented in the file
// gpl.txt aside this file in the shipment you received can be done to the
// lines that follows this copyright notice here, but changes must not be
// done inside the copyright notive above. A re-distribution must contain
// the intact and unchanged copyright notice.
// Contributions and changes to the program code must be marked as such.
package de.anomic.language.identification;
import java.io.File;
import java.io.FilenameFilter;
import java.util.Vector;
/**
* This class loads and provides several language statistics to the system.
* It has been implemented as a Singleton since it has to access several
* files on instanciation which should be avoided since it is very slow.
*/
public class LanguageStatisticsHolder extends Vector<LanguageStatistics> {
private String languageDir = "langstats"; // directory that contains language files
private static LanguageStatisticsHolder instance;
private LanguageStatisticsHolder() {
addAllLanguagesInDirectory(languageDir);
}
/**
* method to get an instance of this class, should be used instead of
* <b>new LanguageStatisticsHolder()</b>
* @return an instance of the class Identificator
*/
public synchronized static LanguageStatisticsHolder getInstance() {
if (instance == null) {
instance = new LanguageStatisticsHolder();
}
return instance;
}
/**
* Reads all language files from a directory.
* @param directory the directory that contains the language files
*/
private void addAllLanguagesInDirectory(String directory) {
File folder = new File(directory);
FilenameFilter filter = new LanguageFilenameFilter();
File[] allLanguageFiles = folder.listFiles(filter);
if (allLanguageFiles != null) {
for (int i = 0; i < allLanguageFiles.length; i++) {
if(allLanguageFiles[i].isFile()) {
this.add(new LanguageStatistics(allLanguageFiles[i]));
}
}
}
}
}
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